Welcome to Wairoa, Northern Hawkes Bay. New Zealand.
Wairoa Head
Nitrogen Dioxide Ozone Carbon Monoxide
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AQ Sensor Temperature: Getting Data °C     AQ Sensor Humidity:     Getting Data %
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Air Quality Levels Live

The Data above and Graphs below are Live and being uploaded to the internet every minute. The Air Quality Sensor System is locally owned and monitored within the Wairoa Township 50 metres above Sea Level. The Sensor System in place is designed to collect very high resolution readings of NO2 and CO concentrations. These two gases are the most indicative elements related to urban air pollution. The enviroment is non traffic congested and hence the expectation of the NO2 and CO Levels is Low. The Temperature and Humidity readings are from the Air Quality Sensor and not the Weather Station Sensor. Both these readings contribute to the Ozone Levels throughout the day.

Nitrogen Dioxide (NO2)
Nitrogen Dioxide is a reddish-brown gas with a pungent, irritating odour. It absorbs light and leads to the yellow-brown haze sometimes seen hanging over cities. It is one of the important components of smog.
Nitrogen oxides occur naturally plus is produced by man's activities. In nature, they are a result of bacterial processes, biological growth and decay, lightning, and forest and grassland fires. The primary source of man-made nitrogen oxides is from the burning of fossil fuels. Agriculture also plays a role in nitrogen oxide emissions with the use of fertilizers contributing nitrous oxide to the atmosphere.
Nitrogen Dioxide is only 10% of the nitrogen oxides emitted. The atmospheric concentrations of nitrous oxide is around 320 ppb in New Zealand. On the ground, the current standard limit for Nitrogen Dioxide is 0.12 ppm for one hour.
Above are readings taken in the Wairoa Township

Carbon Monoxide (CO)
Carbon Monoxide is a deadly, colorless, odorless, poisonous gas. It is produced by fuel-burning devices such as: furnaces, gas or kerosene space heaters, boilers, gas cooking stoves, water heaters, clothes dryers, fireplaces, charcoal grills, wood stoves, lawn mowers, power generators, camp stoves, all motor vehicles and some power tools with internal combustion engines. Smoking is another common source of CO that can negatively impact indoor air quality.
It is deadly because it interferes with normal oxygen uptake for humans and other living organisms needing oxygen to live.
Natural background levels of CO fall in the range of 10-200 ppb. Levels in urban areas are highly variable, depending upon weather conditions and traffic density.
CO concentrations indoors are expected to be the same as CO concentrations outdoors and should average around 9 ppm. If CO concentrations are higher indoors than outdoors this would indicate an indoor source of CO which needs removing.

Ozone (O3) is a gas that can form and react under the action of light and is present in two layers of our atmosphere. High up in the Stratosphere, ozone forms a layer that shields the Earth from Ultraviolet Rays. About 10 - 15% of tropospheric O3 is transported from the stratosphere where it is formed by the action of UV on O2. However, in the Troposphere (lower atmosphere and ground level), Ozone is considered a major air pollutant. Ozone gas (O3) has a bluish colour and, at low concentration, smells like freshly cut hay. People often notice ozone in the sharp smell of electrical equipment or the clean smell after a thunderstorm.
The Ozone Gas is not emitted directly into the air, it is formed when Nitrogen Oxides (NOx) and volatile organic compounds (VOCs) react in the presence of heat and sunlight.
Needless to say, Urban areas have a higher Ozone level than Rural and the level is higher in Summer than Winter. Wairoa has an average to low Ozone Level reaching Levels from between 10 to 20ppb mid Summer with the DU ranging from 290 up to 360.

Ozone Layers


AQS: Air Quality Sensor
NO2: Nitrogen Dioxide
NOx: Nitrogen Oxide
CO: Carbon Monoxide
VOC: Volatile Organic Compounds
UV: Ultraviolet Radiation
O3: Ozone
DU: Ozone Unit of Measurement
C: Celsius
ppb: parts per billion
ppm: parts per million
ohms: Resistance Unit of Measurement

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